A wiki administrator can choose to enable this feature for all pages by putting this into wikiconfig:

The name of the supplementation page and the template used for these pages can be set like this:

A wiki user can control if he wants to have the supplementation feature on a per-page basis by using a processing instruction at the top of the page content:

Usage with off disables the feature on that page.

• Clean pages vs. good context:
  • You can use this to keep your wiki pages clean from discussions or comments (they will be put on the supplementation page).

  • Separating discussions / comments also has some negative impact as you will have to provide context. If you don't do this, it might be unclear to what you are referring. If you could just comment near the context you are commenting, it would be less clean, but somewhat clearer/easier.

• There is only one fixed supplementation_page_name (default: 'Discussion'):

  • If you just have a single language in your wiki, this is no big issue, you just set that page name to whatever you want. Either keep the default english name 'Discussion' or choose it wisely.
  • If you have multiple languages in your wiki, it is recommended to use a pagename that everybody can understand and be happy with (e.g. the english name 'Discussion', just keep the default).

There is also another, quite different "commenting feature" described on HelpOnComments.